Because an achiral molecule is symmetrical, flipping it yields a structurally identical molecule. A flipped chiral molecule, ______blank can be compared to a glove that has been turned inside out: it produces a structurally inverted molecule rather than an identical one.
","stem_html":"Which choice completes the text with the most logical transition?
","rationale_html":"Choice B is the best answer. This sentence compares a chiral molecule to an achiral one. It discusses how when a chiral molecule is flipped, it results in something very different than when an achiral molecule is flipped. So the transition \"by contrast\" fits the context perfectly.
Choice A is incorrect. This choice uses a transition that indicates a restatement of the same idea in different words. But this sentence doesn’t restate the same idea as the previous sentence. Instead, it makes a new point about a different type of molecule (chiral instead of achiral). Choice C is incorrect. This choice uses a transition that introduces an example, which doesn’t make sense here. The second sentence isn’t an example of the first sentence’s claim about achiral molecules: it actually introduces an entirely different idea that focuses on chiral molecules. Choice D is incorrect. This choice uses a transition that indicates the addition of an agreeing idea. But this sentence shows a contrast with the first sentence—namely, that a chiral molecule acts very differently from an achiral molecule when flipped.
","correct_answer":["B"],"has_media":false,"has_mathml":false,"has_table":false,"source_created_at":"2023-08-02T20:25:59.374000+00:00","source_updated_at":"2023-08-02T20:25:59.374000+00:00","options":[{"label":"A","content_html":"in other words,
","ord":0},{"label":"B","content_html":"by contrast,
","ord":1},{"label":"C","content_html":"for example,
","ord":2},{"label":"D","content_html":"similarly,
","ord":3}],"attribution":{"source_id":"cb_question_bank","source_name":"College Board digital SAT question bank (community dump)","rights_holder":"College Board","canonical_url":"https://satsuitequestionbank.collegeboard.org/","retrieved_from":"https://raw.githubusercontent.com/mdn522/sat-question-bank/main/data/cb-digital-questions.json","attribution":"SAT practice questions © College Board, from the official SAT Suite Question Bank. Retrieved via the community dump at github.com/mdn522/sat-question-bank.","disclaimer":"SAT® and PSAT/NMSQT® are trademarks registered by the College Board, which is not affiliated with, does not sponsor, and does not endorse this project.","license":"College Board copyright; source repository carries no licence. Local use only.","redistributable":false,"item_count":2017}}